US3752763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluid
Assignee: Texaco Inc
•
Filing: 1972-04-26
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Granted: 1973-08-14
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Expires: 1992-04-26
Abstract
Abstract AN AQUEOUS DRILLING FLUID DISPERSANT AND A METHOD OF DRILLING WELLS USING AS THE DRILLING FLUID DISPERSANT A 4VINYLDIHYDROXYBENZENE COMPOUND.
Inventors
- 👤 M Kablaoui
- 👤 J Kolaian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:18
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |